Enhancing ethane/ethylene separation performance through the amino-functionalization of ethane-selective MOF  

作　　者：Yao-Yu Ma Wen-Juan Shi Gang-Ding Wang Xin Liu Lei Hou Yao-Yu Wang 

机构地区：[1]Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education,Shaanxi Key Laboratory of Physico-Inorganic Chemistry,College of Chemistry&Materials Science,Northwest University,Xi’an 710069,China

出　　处：《Chinese Chemical Letters》2025年第3期560-565,共6页中国化学快报(英文版)

基　　金：supported by National Natural Science Foundation of China(Nos.22371226 and 22371225);Natural Science Basic Research Program of Shaanxi(No.2024JC-JCQN-18).

摘　　要：The utilization of ethane-selective materials for adsorption-based separation technology presents an energy-efficient alternative to cryogenic distillation for ethylene(C_(2)H_(4))purification from ethane(C_(2)H_(6)).To study the relations between separation performance and pore environments,we carried out the isoreticular chemistry rule to introduce the-NH_(2)groups into a C_(2)H_(6)-selective MOF[Cu_(1.5)(BTC)(DPU)_(1.5)(H_(2)O)_(1.5)],and successfully improved the adsorption capacity and selectivity for C_(2)H_(6)over C_(2)H_(4).The NH_(2)-functionalized MOF[Cu_(1.5)(NH_(2)-BTC)(DPU)_(1.5)(H_(2)O)_(1.5)]with a relatively narrow pore not only forms appropriate pore restriction but also provides additional binding sites to enhance the adsorption capacity of C_(2)H_(6)relative to C_(2)H_(4).Both gas adsorption and dynamic breakthrough results indicated that the-NH_(2)functionalization significantly enhanced the separation performance of materials for C_(2)H_(6)/C_(2)H_(4)mixtures,allowing the production of C_(2)H_(4)with a purity of over 99.99%and a productivity of up to 30.02 L/kg in one step.Theoretical calculations revealed that the synergistic effect of appropriate pore confinement and NH_(2)-modified functional surfaces imposed stronger interactions on C_(2)H_(6)than C_(2)H_(4).

关 键 词：Metal-organic framework AMINO-FUNCTIONALIZATION Gas adsorption Adsorption selectivity SEPARATION 

分 类 号：TQ028.2[化学工程]